This patientıs language development is normal for a 24-month-old child. Her language would not be expected to be completely understandable until 3.5 to 4 years of age. Hearing loss is an important consideration in children with language delay, as is mental retardation. Children with autistic disorder also often have abnormal language development, as well as deficient social interactions and other behavioral problems. Attention deficit disorder is characterized by problems with inattention, impulsivity, and hyperactivity, but generally not with language.